Combined steam-generator and oil-vaporizer



J. T. DAVIS. COMBINED STEAM GENERATOR ANI) OIL APPLICATION FILED MAR. 5, 1918. RIENEWE?4 AU 2 SHEETS-SHEET I.

- Arrfy .1. T. DAVIS. COMBINED STEAIVI GENERATOR AND OIL VAPORIZEIL APPLICATION FILED II'IAR. 5. 1918. RENEWED AUG. 16.I920.

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entran-santas earner @Ferca JoHN T. Davis, or ALAMEDA, CALIFORNIA, AssIGNoR To JOHN BURMEISTDR, or

v SAN FRANCISCO, CALIFORNIA.

cor/INED STEAM-GENERATOR AND oIL-vAPoRIZER.

retracer.

Specification of Letters Patent.

Patented Mar. 22, 1921.

Application led March 5, 1918, Serial No. 220,474. Renewed August 16, 1920. Serial No. 403,823.

To" "all whom t may concern.

Be,it known that JOHN T. Davis, a citizen of thel United States, residing at Alameda, in the county of Alameda and 'A is a cross sectional View of my improved apparatus; Fig'. 2 is a longitudinal sectional view on the line 2-,2 ofFig. 1.

Referring to the dra-wing, 1 indicates the wall of a furnace having a burner 2 and aflue 3. A water pipe 4 enters the front wall of said furnace and extends, first, horizon-y tally, and then downwardly therein,and then communicates with the two branch pipes 6. The apparatus is exactly syinmetrical on both sides ofa central vertical longitudinal plane, and therefore the description of either side will apply equally to both. Each-branch pipe communicates with one end of an annular water, or steam, chamber 7'formed by means of two coaxial cylinders 8, 9, the space betweeny said cylinders being closed at the ends, as shown at 11. From the other end of said chamber 7. a tube 12 leads to one end of an annular chamber 13 formed in a similar manner between two coaxial cylinders 14, 16. yFrom the other end of said chamber 13 leads a cates with one end of an annular chamber 18 formed in asimilar manner between two coaxial cylinders 19, 21. `From the other end of said chamber 18, a tube 22 leads and Icommunicates with one `endof a chamber 23 formed in a similar manner between two coaxial cylinders 24, 26.

It will have been understood from the above that said annular chambers and cylindersare arranged in pairs, one of each pair in each side of the furnace. From the other end of said annular chambers 26 lead tubes 27 which communicatewith a central steam chamber or drum 28 closed at its ends. From the opposite ends of said drum lead downwardly pipes 29, which communicate with the opposite ends of a vaporizer cylin- Oil is supplied by an oil pipe 34 controlled by a valve 35, which pipe extends through a hole in the front wall of said furnace and discharges into a chamber 36 between the head 32 in the cylinder 31 and a cap screwed upon the end of said cylinder 31 and completely filling ysaid hole. From said chamber the oil flows Ainto the'int'erior of the small tubes 33, and discharges at the rear end of the tubes into a vapor chamber 38 formed by a cylindrical wall 39 screwed on the'rear end of said cylinder 31 and filling a hole 41 in the rear wall of the furnace. From the bottom of said chamber 38 leads an oil pipe 42 which passes through the rear .wall ofthe furnace, and the rear side of said chamber 38 communicates with a con-duit 43 for conducting away the vapor generated* from the oil. A baffle plate' 44 is supported by rods 46 from theA back wall of the chamber 38 and is located immediately opposite to the rear ends of the small tubes 33;

rfhe following is the mode of operation' of the apparatus.:

y The water, and the steam generated therefrom, are very highly heated in the annular chambers 7, 13, 18, 23, by the flames passing around the outer cylinders 8, 14, 19, 24, and throught the inner cylinders 9, 16, 21, 26, so that the steam in the uppermost annular chamber 23 is highly superheated. This steam is conducted to the central steam drum 28 where it is again heated still further by the passage of the flames around said drum, so that steam leaving said drum and entering the cylinder 31 is very highly superheated. The heat of the superheated steam is communicated through the walls of the tubes 33 to the oil in said tubes, so that before the oil can How to the rear ends of said tubes, it is for the most part vaporized. The oil and vapors are projected from said tubes with considerable velocity owing to ciently heated to retain its vaporous condition, passes around the baffle plate 44 to the conduit 43 which conduit leads to a conpart which does not retain its vaporous form,l

together with the oil projected from the tubes 33, drops to the bottom of the'chamber 38 and flows outward by the pipe 42. Any steam condensed in the cylinder 3l escapes by a bleeder 54 in the bottom of said cylinder.

I thus provide means in the same `furnace for generating steam, for superheating the steam so generated, and for utilizing steam to vaporize oil, and at the same time conserve and re-heat the steam which has been so utilized to vaporize oil.

1. The combination, with a furnace, of" a vaporizing cylinder having heads at its ends, a plurality oi tubes having open ends extending through said heads, means for forming an oil chamber with one end of' the cylinder and the adjacent head, means for feeding oil to said chamber, a. vapor cham` ber communicating with the tubes through the other end of' the vaporizingcylinder, a baffle plate therein opposite said 'tube ends,

vapor and oil conduits leading from said vapor chamber, a vertical series of pairs of' coaxial tubes' in said furnace, the chamber between .thetubes of'each pair being closed at the ends, the inner tubes being open at the ends, means for supplying water to the lowermost of said chambers, means for conduct ing aqueous fluid from said lowermost chamber to each ofl the upper chambers in succession, the tube conducting aqueousfiuid to each chamber. being at the opposite end to that conducting aqueous fluid from the chamber, a steam drum, means for conducting steam from the uppermost chamber of the series to said steam drum, and communi-A cations between the opposite ends of the steam drum and the corresponding ends of the first-named cylinder.

'2. The combination, with a furnace, of. a

' chamber.

vaporizing cylinder having. heads at its ends, a plurality-of tubes having open ends extending through said heads, means for 4forming an oil chamber with one end of the por and oil conduits leading from said Ava,-

por chamber, a vertical series of pairs of coaxial tubes in said furnace, the chamber between the tubes of' each pair being v'closed at the ends, the inner tubes being ope-n at the ends, means for supplying water to the lowermost of said chambers, means for conducting` aqueous fluid llfrom said lowermost chamber to each of the upper chambers in succession, a steam drum, means for conducting steam from the uppermost chamber of' the seriesf to said Asteam drum, and communications between 'the opposite. ends of the steam drum and the corresponding ends of the first-named cylinder, i

3. The combination,`with a furnace, of a vaporizing'cylinder having heads at its ends, a plurality of tubes havingopen ends eX- tending through said heads, means for forming an oi] chamber with one end of the cyl-4 inder and the adjacent head, means for feedlng oil tosaid chamber, a vapor chamber communicating with the tubes through ,the

other end of the vaporizing cylinder, vapor and oil conduits leading from said vapor chamber, a vertical series of pairs of coaxial tubes in said furnace, the chamber between the tubes of. each pair being closed at its ends, the inner tubes being open at the ends, means for supplying water to the lowermost of 'said chan'ibers, means for conducting aqueous fiuid from said lowermost chamber to each of the upper chambers in succession, and communications between the uppermost chambers of' the series and the vaporizing JOHN T. DAVIS. 

